US2930803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the catalytic reduction of alkylated or arylated anthraquinones
Assignee: LA PORTE CHEMICALS Ltd
•
Filing: 1954-06-03
•
Granted: 1960-03-29
•
Expires: 1974-06-03
Abstract
No abstract record available.
Inventors
- 👤 Holmes William Raymond
- 👤 Feuvre Charles William Le
- 👤 Lait Raymond
- 👤 Wood William Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:57
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023; B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PROCESS FOR THE PRODUCTION OF ANTHRAQUINONE DERIVATIVES SELECTED FROM THE GROUP CONSISTING OF ALKYLATED AND ARYLATED ANTHRAQUINHYDRONES AND ALKYLATED AND ARYLATED ANTRAQUINOLS, WHICH COMPRISES REDUCING A SUBSTITUTED ANTHRAQUINONE SELECTED FROM THE GROUP CONSISTING OF ALKYLATED AND ARYLATED ANTHRAQUINONES IN SOLUTION IN AT LEAST ONE SOLVENT BY MEANS OF HYDROGEN IN THE PRESENCE OF A CATALYST MATERIAL COMPRISING METALLIC PALLADIUM DEPOSITED ON A MAGNESIUM HYDROXIDE CARRIER, SAID CARRIER BEING PREPARED BY MIXING MAGNESIUM CHLORIDE WITH SODIUM HYDROXIDE TO PRECIPITATE MAGNESIUM HYDROXIDE THEN SEPARATING, GRINDING AND DRYING AT NOT MORE THAN 300*C. SAID MAGNESIUM HYDROXIDE, TO FORM SAID CARRIER.
Claim 2
Dependent Claim
98 words
A PROCESS FOR THE PRODUCTION OF ANTHRAQUINONE DERIVATIVES SELECTED FROM THE GROUP CONSISTING OF ALKYLATED AND ARYLATED ANTHRAQUINHYDRONES AND ALKYLATED AND ARYLATED ANTRAQUINOLS, WHICH COMPRISES REDUCING A SUBSTITUTED ANTHRAQUINONE SELECTED FROM THE GROUP CONSISTING OF ALKYLATED AND ARYLATED ANTHRAQUINONES IN SOLUTION IN AT LEAST ONE SOLVENT BY MEANS OF HYDROGEN IN THE PRESENCE OF A CATALYST MATERIAL COMPRISING METALLIC PALLADIUM DEPOSITED ON A MAGNESIUM HYDROXIDE CARRIER, SAID CARRIER BEING PREPARED BY MIXING MAGNESIUM CHLORIDE WITH SODIUM HYDROXIDE TO PRECIPITATE MAGNESIUM HYDROXIDE THEN SEPARATING, GRINDING AND DRYING AT NOT MORE THAN 300*C. SAID MAGNESIUM HYDROXIDE, TO FORM SAID CARRIER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |